A Congregationalist is a member of a Christian denomination that emphasizes the autonomy of individual congregations. Each church governs itself independently, making decisions about worship, leadership, and community involvement without external authority. This approach reflects a belief in the priesthood of all believers, where every member has a role in the church's life. The roots of Congregationalism can be traced back to the Protestant Reformation and the Puritan movement in the 16th and 17th centuries. It is closely associated with the founding of the United Church of Christ and has influenced various other denominations, promoting democratic governance and local church authority.